Shrinkage cracks are a common issue in construction that occur when there is a decrease in volume of the mixture used for building. The word "shrinkage" is spelled as /ˈʃrɪŋkɪdʒ/, with two syllables and the stressed vowel (ˈʃrɪŋ) being pronounced as "shring". The word "cracks" is pronounced as /kræks/, with only one syllable and the stressed vowel (kræ) being pronounced as "krak". Together, the pronunciation of "shrinkage cracks" is /ˈʃrɪŋkɪdʒ kræks/. Proper preparation and monitoring can help reduce the occurrence of these types of cracks in construction.
Shrinkage cracks, also known as drying cracks or settlement cracks, refer to the thin fissures or fractures that appear on the surface of materials, typically due to the reduction or loss of moisture content. This phenomenon is commonly observed in various construction and manufacturing processes, particularly in materials such as concrete, clay, soil, and timber.
Shrinkage cracks occur when the volume of a material decreases as it dries or undergoes a curing process. As the moisture within the material evaporates or escapes, it creates internal stresses that subsequently cause the material to shrink. Since the outer layers of the material are restrained by the inner layers, the material undergoes a reduction in size, leading to the formation of cracks at the weakest points.
These cracks can manifest in different patterns and sizes, ranging from hairline cracks to wider fissures, depending on the severity of the shrinkage and structural properties of the material. Shrinkage cracks are more likely to occur in larger, thicker materials, as they have a greater amount of moisture to lose during the drying process.
In construction, shrinkage cracks can be detrimental to the structural integrity and aesthetics of buildings, as they can compromise the stability and durability of the materials. Therefore, measures such as proper joint design, the addition of reinforcements, and the use of curing techniques are often implemented to mitigate the occurrence and impact of shrinkage cracks.
Overall, shrinkage cracks are a natural consequence of the drying or curing process of materials, resulting in the formation of surface fractures due to the reduction in moisture content and subsequent shrinkage.
In geol., rents in clayey beds caused by drying and shrinking.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "shrinkage cracks" is a compound term consisting of the noun "shrinkage" and the noun "cracks". The etymology of each term is as follows:
1. Shrinkage: The term "shrinkage" originates from the verb "shrink", which comes from the Middle English word "shrinken" and the Old English word "scrincan". Both these words had the meaning of "to contract or draw back". Over time, "shrinkage" developed as a noun form to describe the process of contracting or diminishing in size or volume.
2. Cracks: The noun "crack" comes from various sources. It can be traced back to the Old English word "cracian", which meant "to resound or crackle".